Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e728d312f1f416d…

MALICIOUS

PDF

71.8 KB Created: 2020-08-12 02:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ebb9e313e8d2d71d226cc7bdbb0cca9 SHA-1: edb7baa5e4a631fff1c25b5f85ce2303bc9deb2f SHA-256: 2e728d312f1f416dec91130227c724e207d811328946dc082fcd9c75b9db62ae
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm designed to manipulate search engine results or lure users. One critical heuristic identified a link to a known malicious redirector infrastructure at `ttraff.com`. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wb?keyword=kia%20picanto%20manual%20transmission%202010
    • http://files.ridgeroasters.com/uploads/1/3/1/4/131407802/bowazobenifadoleruv.pdf
    • http://files.salinasvalleyartassociation.com/uploads/1/3/1/6/131636903/puron_japevu_mivibo_mezagenexo.pdf
    • http://files.hoboharvest.com/uploads/1/3/1/4/131437873/munozevimis_sanifemagig_nisotel.pdf
    • https://cdn.shopify.com/s/files/1/0438/6720/9893/files/biomedical_ethics_walter_glannon.pdf
    • https://cdn.shopify.com/s/files/1/0431/1724/8672/files/70050843380.pdf
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/30392672240.pdf
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/lifusililerabatarodit.pdf
    • https://cdn.shopify.com/s/files/1/0435/7442/7811/files/ritufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/xetapima.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/substring_e5_80_92_e6_95_b034.pdf
    • https://cdn.shopify.com/s/files/1/0432/5975/6708/files/21624495112.pdf
    • https://cdn.shopify.com/s/files/1/0432/5664/3739/files/migagalazunegoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/6453/9798/files/vukijun.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/71156807457.pdf
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/arquitectura_moderna_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/10407189321.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b648.bin
9933e23bbe3aedd72aba629a599e58e1d3f657b227235f9fc21b7cda629b9cff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB648 4224 bytes
font_01_sfnt_off0000c528.bin
07cd5282e93a7d2ebe4bdf5333dd6375bf65fca742be7f5245e410ffd1882ad9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC528 5376 bytes
font_02_sfnt_off0000d756.bin
88a18ee1fe240bde6e15b4152fdf0fb0ed2f9c0db05e585344a873f6998722d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD756 11168 bytes
font_03_sfnt_off0000fcd8.bin
3e116717cad20e2c0569d91da9894c93837aca48344ac8952af0b12a81aa0141		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD8 16060 bytes

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